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Spray-induced gene silencing for disease control is dependent on the efficiency of pathogen RNA uptake

Journal Article · · Plant Biotechnology Journal
DOI:https://doi.org/10.1111/pbi.13589· OSTI ID:1784294
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [2];  [5];  [4];  [3];  [1];  [4]
  1. Nanjing Agricultural University (China); Ministry of Education, Nanjing (China); Univ. of California, Riverside, CA (United States)
  2. Nanjing Agricultural University (China); Ministry of Education, Nanjing (China)
  3. Univ. of California, Riverside, CA (United States); Marche Polytechnic University, Ancona (Italy)
  4. Univ. of California, Riverside, CA (United States)
  5. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Recent discoveries show that fungi can take up environmental RNA, which can then silence fungal genes through environmental RNA interference. This discovery prompted the development of Spray-Induced Gene Silencing (SIGS) for plant disease management. In this study, we aimed to determine the efficacy of SIGS across a variety of eukaryotic microbes. We first examined the efficiency of RNA uptake in multiple pathogenic and non-pathogenic fungi, and an oomycete pathogen. We observed efficient double-stranded RNA (dsRNA) uptake in the fungal plant pathogens Botrytis cinerea, Sclerotinia sclerotiorum, Rhizoctonia solani, Aspergillus niger and Verticillium dahliae, but no uptake in Colletotrichum gloeosporioides, and weak uptake in a beneficial fungus, Trichoderma virens. For the oomycete plant pathogen, Phytophthora infestans, RNA uptake was limited and varied across different cell types and developmental stages. Topical application of dsRNA targeting virulence-related genes in pathogens with high RNA uptake efficiency significantly inhibited plant disease symptoms, whereas the application of dsRNA in pathogens with low RNA uptake efficiency did not suppress infection. Our results have revealed that dsRNA uptake efficiencies vary across eukaryotic microbe species and cell types. The success of SIGS for plant disease management can largely be determined by the pathogen's RNA uptake efficiency.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Institutes of Health (NIH); National Science Foundation (NSF); USDA; National Institute of Food and Agriculture (NIFA); Australian Research Council (ARC); Canadian Institute for Advanced Research (CIFAR); Jiangsu Agricultural Science and Technology Innovation Fund of China
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1784294
Journal Information:
Plant Biotechnology Journal, Journal Name: Plant Biotechnology Journal Journal Issue: 9 Vol. 19; ISSN 1467-7644
Publisher:
Society for Experimental Biology; Association of Applied BiologyCopyright Statement
Country of Publication:
United States
Language:
English

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